George s



(No Model'.)

G. S. BINOKLEY. BRAKE WHEEL FOR HOISTING ENGINES.

No. 588,261. Patented Aug. 17,1897.

' 1 UNITED STATES PATENT QFFICEO enonen s. BINCKLEY, or SAN FRANCISCO, CALIFORNIA, Assieuon TO THE UNION IRON woRKs, or SAME PLACE.

BRAKE-WHEEL FOR HOlSTlNG-ENGINES.

SPECIFICATION forming part of Letters Patent No. 588,261, dated August 17 1897.

' Application filed January 2, 1897. Serial No. 617,834. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE S. BINGKLEY,

a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Brake-VVheels for Hoisting-Engines; and I do hereby declare that the following is a full, clear, and exact description thereof,

The present invention relates to a certain new and usefulexpansible rim attachment for the winding-drum or brake-wheel of hoistingengines; and it consists in-the arrangement of parts and details of construction, as will be hereinafter fully set forth in the drawings and described and pointed out in the specification.

In the lowering of buckets 0r cages down into the shafts of mines it is necessary that the brake mechanism be applied to the rim of the brake-wheel or winding-drum of the hoisting-engines, so as to prevent the bucket or cage from descending at too great a speed. Inasmuch, however, as the bucket or cage is lowered at the rate of about forty feet per second with the brake mechanism applied, cated or interposed the filling-blocks B, which it is evident that the friction of the brake blocks are held in place by means of the bolts wheel or winding-drum caused by thebrakea. This brake-wheel is surrounded by the shoes bearing against the periphery thereof, removable braking-rim, which rim is com- 80 generated by the velocity with which the posed of the sections 13 B united and held brake -wheel or winding drum is rotated, together by means of the bolts 19, passing causes the said brake-wheel or drum to bethrough the ears Z), depending from each end' come heated to such an'ex'tent as to cause the of the sections. The rim 0 proper of the expansion of the metal rim of the said brakebrake-wheel or drum is provided with a pro- 85 wheel 01' drum. The expansionnot being jecting flange 1), upon which rests the deuniform throughout the Wheel, but only upon pending side flange b of the removable brakethe rim thereof, it is obvious that as the said rim, the opposite depending side flange b of rim expands the diameter thereof in increased said rim bearing upon the-rim proper of the and the strain thereof upon the spokes or arms brake-wheel or drum, Fig. 4. hen the re- 90 of the wheel tends to crack or break the same. movable rim has been united around the The object of my invention is to obviate this brake-Wheel, an annular passage-way 01 will tendency of the brake-wheel or winding-drum be left between the under face of the removto break or crack by undue or unequal exable brake-rim and the face of the rim of the pansion of the Wheel-rim, and this I accombrake-Wheel proper. Within this annular 5 plish by providing what, may be termed a passage-wayis placed whatIterm anelastic supplemental or removable rim for the metallic band C. This band is composed In order to fully understand the invention, reference must be had to the accompanying sheet of drawings, forming a part of this application, wherein Figure 1 is a side view in elevation, partly broken away, showing the winding-drum or brake-wheel, the removable rim, the elasticband, and the manner of connecting the parts. Fig. 2 is a front view in elevation. Fig. 3 is 'a broken cross-sectional view in elevation, taken on line to co, Fig. 1, showing the manner of securing the elastic metallic band tot-he under face of the removable rim of the wheel or drum; and Fig. 4 is a similar view, taken on line y y, Fig. 1, showing the manner of uniting the elastic metallic band'to the rim proper of the drum or brake-wheel.

The letter A is used to indicate a suitable drive-shaft of the ordinary hoisting-engine, upon which is mounted the winding-drum or brake-wheel, said drum or wheel being composed of sections A A united by bolts a, which extend through the ears a, projecting from each section of the Wheel or drum. Between the ends of each section A A are 10- drum or brake-wheel and interposing between the said-rim and the rim proper of the drum or brake-wheel an inner elastic metallic band which will compensate for the expansion of the brake-wheel or winding-drum.

of metal and surrounds the rim of the brakewheel or drum proper, being connected at each end thereof to the lugs d (1 upwardly IOO projecting from the face of the brake-wheel, by means of bolts d The removable rim is cast on its under face at given intervals with a series of depending lugs e and the rim of the brake-wheel or drum with a series of projecting lugs or bosses e. To these lugs or bosses the elastic metallic band is secured, the band being fastened to the lugs or bosses e of the removable rim by bolts 6 and then to the projecting bosses or lugs c of the brake-wheel rim by bolts 6 and so on, being fastened alternately to the re movable rim and the rim of the brake-wheel until the free end is secured to the projecting lugs (Z In order to gain access to the securing-bolts of the expa-nsible rim C, the side flange of the removable rim and of the brake-wheel or drum is cut away at given intervals, so as to provide pockets or side openingsfsuflicient to permit of a hand-tool being inserted to manipulate the fastening-bolts.

By securing the elastic band alternately to the removable rim and the rim of the brake wheel or drum the strain due to expansion is removed from the arms or spokes of the said brake-wheel or drum. Consequently whatever heat is generated by the friction on the removable rim does not affect the brakewheel, but is compensated for by the elastic metallic band interposed between the said removable rim and the brake-wheel proper.

The removable brake-rim is cast with the upwardlyprojecting side flanges f, which serve as guides, between which the brake blocks or shoes (not shown) work when braking against the surface of the brake-wheel or drum. Consequently as the same becomes worn by frictional wear the same may be removed and a new rim be inserted in lieu thereof. In this manner the life or durability of the brake-wheel or drum is preserved, for at no time do the brake shoes or blocks bear or brake thereon.

Having thus described my invention, what I claim as new, and desire to secure protection in by Letters Patent, is

1. The combination with a brake-wheel or winding-drum, of a braking-rim removably secured around the wheel or drum, and of an elastic metallic band interposed between the braking-rim and the rim of the brake-wheel or drum.

2. The combination with a brake-wheel or windingdrurn of a braking-rim removably secured around the said wheel or drum, and of an elastic metallic band interposed between the removable rim and the brake-wheel or drum, said elastic band being secured alternately to the rim of the brake-wheel or drum and to the removable braking-rim.

3. The combination witlra brake-wheel or winding-drum, of a braking-rim removably secured around the said wheel or drum, an annular passage-way formed between the inner face of the removable rim and the face of the brake-wheel or drum, an elastic metallic band located within said annular passage-way and secured alternately to the brake-wheel or drum and the removable rim, and of a series of side pockets intercepting theannular passage-way at points of union of the elastic band to the brake-wheel and the removable rim.

4-. The combination with a brake-wheel or drum provided with a series of projecting lugs or bosses, of a removable braking-rim secured around the brake-wheel or drum, a series of lugs or bosses depending from said rim, and of an elastic metallic band interposed beiween the removable rim and the brake-wheel, said elastic band being eonneeted to the projecting and depending studs or lugs.

In testimony whereof I aflix my signature, in presence of two witnesses, this 26th day of December 1896.

GEORGE S. BINCKLEY.

\Vitnesses:

N. A. ACKER, LEE D. CRAIG. 

